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Which mechanism limits conductivity when electrons populate anti-bonding bands in doped semiconductors?

A)Increased electron-phonon scattering
B)Reduced crystal lattice symmetry
C)Enhanced electron tunneling probability
D)Augmented electron-hole recombination

💡 Explanation

Populating anti-bonding bands destabilizes lattice structure, increasing electron-phonon scattering which hinders electron mobility. Because scattering impedes electron flow, higher resistance emerges, therefore conductivity decreases rather than increase from excess carriers.

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